QgsSingleBandPseudoColorRenderer* QgsSingleBandPseudoColorRenderer::clone() const
{
QgsRasterShader *shader = nullptr;
if ( mShader )
{
shader = new QgsRasterShader( mShader->minimumValue(), mShader->maximumValue() );
// Shader function
const QgsColorRampShader* origColorRampShader = dynamic_cast<const QgsColorRampShader*>( mShader->rasterShaderFunction() );
if ( origColorRampShader )
{
QgsColorRampShader * colorRampShader = new QgsColorRampShader( mShader->minimumValue(), mShader->maximumValue() );
if ( origColorRampShader->sourceColorRamp() )
{
colorRampShader->setSourceColorRamp( origColorRampShader->sourceColorRamp()->clone() );
}
colorRampShader->setColorRampType( origColorRampShader->colorRampType() );
colorRampShader->setClip( origColorRampShader->clip() );
colorRampShader->setColorRampItemList( origColorRampShader->colorRampItemList() );
shader->setRasterShaderFunction( colorRampShader );
}
}
QgsSingleBandPseudoColorRenderer * renderer = new QgsSingleBandPseudoColorRenderer( nullptr, mBand, shader );
renderer->copyCommonProperties( this );
return renderer;
}
void QgsRasterShader::readXML( const QDomElement& elem )
{
//only colorrampshader
QDomElement colorRampShaderElem = elem.firstChildElement( "colorrampshader" );
if ( !colorRampShaderElem.isNull() )
{
QgsColorRampShader* colorRampShader = new QgsColorRampShader();
colorRampShader->setColorRampType( colorRampShaderElem.attribute( "colorRampType", "INTERPOLATED" ) );
colorRampShader->setClip( colorRampShaderElem.attribute( "clip", "0" ) == "1" );
QList<QgsColorRampShader::ColorRampItem> itemList;
QDomElement itemElem;
QString itemLabel;
double itemValue;
QColor itemColor;
QDomNodeList itemNodeList = colorRampShaderElem.elementsByTagName( "item" );
for ( int i = 0; i < itemNodeList.size(); ++i )
{
itemElem = itemNodeList.at( i ).toElement();
itemValue = itemElem.attribute( "value" ).toDouble();
itemLabel = itemElem.attribute( "label" );
itemColor.setNamedColor( itemElem.attribute( "color" ) );
itemList.push_back( QgsColorRampShader::ColorRampItem( itemValue, itemColor, itemLabel ) );
}
colorRampShader->setColorRampItemList( itemList );
setRasterShaderFunction( colorRampShader );
}
}
QgsRasterRenderer* QgsSingleBandPseudoColorRendererWidget::renderer()
{
QgsRasterShader* rasterShader = new QgsRasterShader();
QgsColorRampShader* colorRampShader = new QgsColorRampShader();
colorRampShader->setClip( mClipCheckBox->isChecked() );
//iterate through mColormapTreeWidget and set colormap info of layer
QList<QgsColorRampShader::ColorRampItem> colorRampItems;
int topLevelItemCount = mColormapTreeWidget->topLevelItemCount();
QTreeWidgetItem* currentItem;
for ( int i = 0; i < topLevelItemCount; ++i )
{
currentItem = mColormapTreeWidget->topLevelItem( i );
if ( !currentItem )
{
continue;
}
QgsColorRampShader::ColorRampItem newColorRampItem;
newColorRampItem.value = currentItem->text( 0 ).toDouble();
newColorRampItem.color = currentItem->background( 1 ).color();
newColorRampItem.label = currentItem->text( 2 );
colorRampItems.append( newColorRampItem );
}
// sort the shader items
qSort( colorRampItems );
colorRampShader->setColorRampItemList( colorRampItems );
if ( mColorInterpolationComboBox->currentText() == tr( "Linear" ) )
{
colorRampShader->setColorRampType( QgsColorRampShader::INTERPOLATED );
}
else if ( mColorInterpolationComboBox->currentText() == tr( "Discrete" ) )
{
colorRampShader->setColorRampType( QgsColorRampShader::DISCRETE );
}
else
{
colorRampShader->setColorRampType( QgsColorRampShader::EXACT );
}
rasterShader->setRasterShaderFunction( colorRampShader );
int bandNumber = mBandComboBox->itemData( mBandComboBox->currentIndex() ).toInt();
QgsSingleBandPseudoColorRenderer *renderer = new QgsSingleBandPseudoColorRenderer( mRasterLayer->dataProvider(), bandNumber, rasterShader );
renderer->setClassificationMin( lineEditValue( mMinLineEdit ) );
renderer->setClassificationMax( lineEditValue( mMaxLineEdit ) );
renderer->setClassificationMinMaxOrigin( mMinMaxOrigin );
return renderer;
}
void QgsRasterShader::readXml( const QDomElement& elem )
{
//only colorrampshader
QDomElement colorRampShaderElem = elem.firstChildElement( QStringLiteral( "colorrampshader" ) );
if ( !colorRampShaderElem.isNull() )
{
QgsColorRampShader* colorRampShader = new QgsColorRampShader();
// try to load color ramp (optional)
QDomElement sourceColorRampElem = colorRampShaderElem.firstChildElement( QStringLiteral( "colorramp" ) );
if ( !sourceColorRampElem.isNull() && sourceColorRampElem.attribute( QStringLiteral( "name" ) ) == QLatin1String( "[source]" ) )
{
colorRampShader->setSourceColorRamp( QgsSymbolLayerUtils::loadColorRamp( sourceColorRampElem ) );
}
colorRampShader->setColorRampType( colorRampShaderElem.attribute( QStringLiteral( "colorRampType" ), QStringLiteral( "INTERPOLATED" ) ) );
colorRampShader->setClassificationMode( static_cast< QgsColorRampShader::ClassificationMode >( colorRampShaderElem.attribute( QStringLiteral( "classificationMode" ), QStringLiteral( "1" ) ).toInt() ) );
colorRampShader->setClip( colorRampShaderElem.attribute( QStringLiteral( "clip" ), QStringLiteral( "0" ) ) == QLatin1String( "1" ) );
QList<QgsColorRampShader::ColorRampItem> itemList;
QDomElement itemElem;
QString itemLabel;
double itemValue;
QColor itemColor;
QDomNodeList itemNodeList = colorRampShaderElem.elementsByTagName( QStringLiteral( "item" ) );
itemList.reserve( itemNodeList.size() );
for ( int i = 0; i < itemNodeList.size(); ++i )
{
itemElem = itemNodeList.at( i ).toElement();
itemValue = itemElem.attribute( QStringLiteral( "value" ) ).toDouble();
itemLabel = itemElem.attribute( QStringLiteral( "label" ) );
itemColor.setNamedColor( itemElem.attribute( QStringLiteral( "color" ) ) );
itemColor.setAlpha( itemElem.attribute( QStringLiteral( "alpha" ), QStringLiteral( "255" ) ).toInt() );
itemList.push_back( QgsColorRampShader::ColorRampItem( itemValue, itemColor, itemLabel ) );
}
colorRampShader->setColorRampItemList( itemList );
setRasterShaderFunction( colorRampShader );
}
}